FYI: Current hackage-registered libraries which exclude base-4.4 from GHC 7.2

Henning Thielemann lemming at
Sun Aug 7 16:07:58 CEST 2011

On Sun, 7 Aug 2011, Sjoerd Visscher wrote:

> Does it ever make sense to have a dependency base < 5?

If 'base' follows the package version policy, then it does not make sense. 
Does 'base' follow this policy?

> Strictly speaking never, because you can never know if a future 4.x 
> change breaks your package, but maybe there are some rules of thumb when 
> it is allowed?

I admit I also used 'base < 5' a lot, since in my experience, there was no 
breakage of my packages within 'base == 4.*'. If module XYZ in base 
changes, then according to the PVP, the major version of 'base' must be 
increased. If I do not use XYZ this does not matter for me. The problem 
for me is, that 'base' is still large and thus there are many modules of 
it, that I do not use.

More information about the Libraries mailing list